This Presentation is about DOS Attack and types.

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DOS Attack
Aishwarya

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Contents
Denial Of Service Attack
Introduction
Largest DOS Attack
Example
Types of Dos Attack
Symptoms

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Introduction
Denial Of Service Attack is an attempt to make a machine or
network resource unavailable to its intended users.
Basically,Sending the more requests than the capacity of the server.

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Contd.
It is analogues to group of people crowding the entry door
to a shop and not letting legitimate parties enter into the shop,
disrupting the normal operation.

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Largest DOS Attack
Denial of service attack against the BBC website may have been the
largest in history.
A group calling itself New World Hacking said that the attack
reached 602Gbps.
Accurately, that would put it at almost twice the size of the previous
record of 334Gbps,
recorded by Arbor Networks.

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Scenario 1
Example

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When telephone exchange lines are free.

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Scenario 2
When the telephone exchange lines are busy.

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The User want to connect with Telephone exchange.

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Types of Dos Attack
Ping Of Death
Buffer Overflow
TCP Syn Attack

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Symptoms
Unusually slow network performance.
Unavailability of a particular web site.
Inability to access any web site.
Dramatic increase in the number of spam emails received.

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References
http://www.csoonline.com/article/3020292/cyber­attacks­
espionage/ddos­attack­on­bbc­may­have­been­biggest­in­
history.html
http://www.digitalattackmap.com/understanding­ddos/
http://searchsecurity.techtarget.com/definition/denial­of­service

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Thank You!